chore: add collaborator in .asf.yaml (#323)

Author: imbajin

.asf.yaml

@@ -46,6 +46,9 @@ github:
         dismiss_stale_reviews: true
         require_code_owner_reviews: false
         required_approving_review_count: 1
+  # (for non-committer): assign/edit/close issues & PR, without write access to the code
+  collaborators:
+    - hankwenyx
 
 notifications:
   # use https://selfserve.apache.org to manage it